CN105756020A - Concise chart method for reasonable arrangement of supporting arm in longitudinal framework of arc-shaped steel gate - Google Patents
Concise chart method for reasonable arrangement of supporting arm in longitudinal framework of arc-shaped steel gate Download PDFInfo
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- CN105756020A CN105756020A CN201610286043.XA CN201610286043A CN105756020A CN 105756020 A CN105756020 A CN 105756020A CN 201610286043 A CN201610286043 A CN 201610286043A CN 105756020 A CN105756020 A CN 105756020A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/20—Movable barrages; Lock or dry-dock gates
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Abstract
The invention discloses a concise chart method for reasonable arrangement of a supporting arm in a longitudinal framework of an arc-shaped steel gate. The method comprises the following steps: establishing an arc-shaped door longitudinal framework structure model by programming with an APDL language in a three-dimensional finite element method; writing a calculation procedure by using the APDL language of ANSYS14.0 by taking a regular arrangement result as an initial value and an arrangement site as a variable, and extracting a bending moment value of the bottom end of the supporting arm, and ending the calculation when the bending moment value is zero, wherein the supporting arm arrangement result at the time is a reasonable arrangement result of the finite element method, so that a graph is drawn based on the result by taking a/H as a transverse coordinate and the arrangement position of the supporting arm as a longitudinal coordinate, to obtain a concise chart for the arrangement of the supporting arm of an arc-shaped door in the longitudinal framework, and the concise chart can be directly supplied to an engineering designer for use.
Description
Technical field
The invention belongs to hydraulic steel radial gate placement technique field, specifically, relate to the simple and clear diagram method of a kind of steel arch-gate longitudinal framing support arm reasonable Arrangement.
Background technology
The whether reasonable of gates of segmental shape support arm layout is directly connected to integrally-built safety and economy.For the problem that arc support arm of door is arranged, China's existing " Hydraulic and Hydro-Power Engineering steel-slag sand design specification (SL74-2013) " only specifies to press to wait carries principle layout, and also require " reducing the moment of flexure of support arm in longitudinal framing plane; make support arm closer to uniaxial eccentric compression rod member " as far as possible, but there is no feasible method, a large amount of engineering practices show that the support arm arranged by laws for criterion there is problems in that a) longitudinal girder upper cantilever section is long, causes that structure integral rigidity declines；B) longitudinal girder is relatively big at the junction cross section corner with support arm, makes support arm produce bigger moment of flexure in fore-and-aft plane and biaxial eccentric load occurs, thus reducing the stability in the large of structure.For the shortcoming overcoming specification method for arranging, make support arm closer to uniaxial eccentric compression rod member, Wang Zhengzhong, Liu Jiliang are with arm end angular displacement for zero, by method of structural mechanics, longitudinal curved beam framework is reduced to straight beam and proposes the reasonable Arrangement method of table hole and deep-outiet radial gate support arm structure, but produce bigger error because its curved beam is reduced to straight beam, as a) arc door longitudinal direction curved beam being reduced to continuous straight beam；B) original curved beam by linear load effect is no longer linear by water ballast(ing) after generated straight beam；C) interaction of longitudinal girder and support arm can not be considered；D) only give table hole and two kinds of typical special circumstances of deep-outiet radial gate, and the layout of the down-the-hole arc door under more common different head still cannot be followed.Set up arc door longitudinal framing structure model for zero based on limited space metatheory with arc support arm of door support arm end moment of flexure in longitudinal framing and consider that the support arm structure of arc door is arranged in the interaction of main longitudinal grider and support arm.
Summary of the invention
It is an object of the invention to the defect overcoming above-mentioned technology to exist, it is provided that the simple and clear diagram method of a kind of steel arch-gate longitudinal framing support arm reasonable Arrangement, be respectively adopted method for normalizing, method of structural mechanics and FInite Element and its Rational structure layout has been studied.First, adopting straight beam method to be deduced arc support arm of door general theory formula of reasonable Arrangement in longitudinal framing according to styletable without corner, foundation styletable moment of flexure is the reasonable Arrangement that zero employing Space FEM have studied support arm simultaneously.Secondly, 756 kinds of layout results according to method for normalizing, straight beam method and FInite Element of comparative evaluation.The material saving rate that material saving rate is [32.63,47.58] (%) and three support arm arc doors of the method two support arm arc door of the present invention is [21.61,30.01] (%).
Its concrete technical scheme is:
The simple and clear diagram method of a kind of steel arch-gate longitudinal framing support arm reasonable Arrangement, comprises the following steps: adopt the APDL Programming with Pascal Language in three-dimensional finite element method to set up arc door longitudinal framing structure model；With the result of specification layout for initial value, with layout points position for variable, calculation procedure write in the APDL language utilizing ANSYS14.0, and extract the moment of support arm bottom, and calculating when this moment is zero and terminate, support arm now arranges that result is the reasonable Arrangement result of FInite Element, described result is with a/H for abscissa, draw for vertical coordinate with the position of support arm, obtain the simple and clear chart that arc support arm of door is arranged in longitudinal framing, directly for project planner.
Compared with prior art, beneficial effects of the present invention:
The present invention provides the simple and clear diagram method of a kind of steel arch-gate longitudinal framing support arm reasonable Arrangement, it is possible to solves hydraulic steel radial gate due to structure and arranges the improper problem making support arm biaxial eccentric load and causing stability in the large seriously to reduce.The material saving rate of the inventive method two support arm arc door is the material saving rate of [32.63,47.58] (%) and three support arm arc doors is [21.61,30.01] (%).Adopt the arc door longitudinal framing support arm structure not only safety economy that the Finite Element Method of the present invention is arranged, and theoretical foundation can be provided for the specification revision of gate structure arranging section.
Accompanying drawing explanation
Fig. 1 is that two support arms arrange Comparative result figure；
Fig. 2 is that three support arms arrange Comparative result figure.
Detailed description of the invention
Below in conjunction with accompanying drawing and specific embodiments, technical scheme is described in more detail.
The present invention is directed to hydraulic steel radial gate and arrange the improper problem making support arm biaxial eccentric load and causing stability in the large seriously to reduce due to structure, be respectively adopted method for normalizing, method of structural mechanics and FInite Element and its Rational structure is arranged studied.First, adopting straight beam method to be deduced arc support arm of door general theory formula of reasonable Arrangement in longitudinal framing according to styletable without corner, foundation styletable moment of flexure is the reasonable Arrangement that zero employing Space FEM have studied support arm simultaneously.Secondly, 756 kinds of layout results according to method for normalizing, straight beam method and FInite Element of comparative evaluation, further study different main longitudinal grider and arrange with support arm specific stiffness comparison arc door longitudinal framing support arm and the impact of material usage.Result shows: the arc support arm of door arranged by method for normalizing, straight beam method and FInite Element respectively large eccentric pressuring, small eccentric pressure and axial compression in longitudinal framing；The support arm of his-and-hers watches radial door and down-the-hole arc door arranges that straight beam method and FInite Element difference are relatively big, and deep-outiet radial gate is closer to；Main longitudinal grider is little with the layout impact of the specific stiffness comparison arc support arm of door of support arm, but material usage impact is bigger；Compared with laws for criterion, two, the three support arm arc doors that straight beam method and FInite Element are arranged all can save material usage, the material saving rate of the method two support arm arc door that the FInite Element that wherein present invention proposes is arranged is [32.63,47.58] the material saving rate of (%) and three support arm arc doors is [21.61,30.01] (%).Finally obtain the simple and clear chart that the arc support arm of door of three kinds of methods is arranged in longitudinal framing, be available for engineers and technicians and directly use.
1) laws for criterion
Hydraulic and Hydro-Power Engineering steel-slag sand design specification being arranged, gate arm is according to waiting load concrete formula of carrying out of requirement to be: assuming that kth (k=1,2 ..., n) root girder is Z to the distance of the door top water surfacek, can be calculated as follows.
To extended-top type arc door
In formula: n is girder number；H is the distance (m) at the bottom of the water surface arrives.
To down-the-hole type arc door
In formula: a is the water surface distance (m) to door top.
2) straight beam method
Water ballast(ing) on down-the-hole arc door main longitudinal grider is along arc length trapezoidal profile, and trapezoid distributed load can be equivalent to the superposition of evenly load and linear load.Main longitudinal grider is directly rigidly connected formation plane rigid frame with support arm, hinge property bearing can be reduced to when supporting place is without moment of flexure according to the support arm that straight beam method and main longitudinal grider have just connect, therefore the plane rigid frame being made up of main longitudinal grider and support arm can be reduced to continuous beam, wherein two support arm structures are statically determinate structure, and three support arm structures are redundant structure.Undertaken by layer control and MATHEMATICA programming method solving the layout result that can respectively obtain two support arms and three support arm arc doors.
3) FInite Element
The APDL Programming with Pascal Language in three-dimensional finite element method is adopted to set up arc door longitudinal framing structure model.With the result of specification layout for initial value, with layout points position for variable, utilize the APDL language of ANSYS14.0 to write calculation procedure, and extract the moment of support arm bottom, calculating when this moment is zero and terminate, support arm now arranges that result is the reasonable Arrangement result of FInite Element.
By the result of three of the above method for arranging with a/H for abscissa, draw for vertical coordinate with the position of support arm, the arc support arm of door of the three kinds of methods layout chart in longitudinal framing can be obtained, directly for project planner.Fig. 1 is that two support arms arrange Comparative result figure；Fig. 2 is that three support arms arrange Comparative result figure.
The above; it is only the present invention preferably detailed description of the invention; protection scope of the present invention is not limited to this; any those familiar with the art is in the technical scope of present disclosure, and the simple change of the technical scheme that can become apparent to or equivalence are replaced and each fallen within protection scope of the present invention.
Claims (1)
1. the simple and clear diagram method of a steel arch-gate longitudinal framing support arm reasonable Arrangement, it is characterised in that comprise the following steps: adopt the APDL Programming with Pascal Language in three-dimensional finite element method to set up arc door longitudinal framing structure model；With the result of specification layout for initial value, with layout points position for variable, calculation procedure write in the APDL language utilizing ANSYS14.0, and extract the moment of support arm bottom, and calculating when this moment is zero and terminate, support arm now arranges that result is the reasonable Arrangement result of FInite Element, described result is with a/H for abscissa, draw for vertical coordinate with the position of support arm, obtain the simple and clear chart that arc support arm of door is arranged in longitudinal framing, directly for project planner.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610286043.XA CN105756020B (en) | 2016-05-03 | 2016-05-03 | A kind of concise diagram method of steel arch-gate longitudinal framing support arm reasonable Arrangement |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610286043.XA CN105756020B (en) | 2016-05-03 | 2016-05-03 | A kind of concise diagram method of steel arch-gate longitudinal framing support arm reasonable Arrangement |
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| Publication Number | Publication Date |
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| CN105756020A true CN105756020A (en) | 2016-07-13 |
| CN105756020B CN105756020B (en) | 2017-10-13 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007113967A (en) * | 2005-10-18 | 2007-05-10 | Central Res Inst Of Electric Power Ind | Method of evaluating reliability of structure deteriorated due to aging |
| CN102968518A (en) * | 2012-10-08 | 2013-03-13 | 蔡坤 | Topology optimization design method for novel down-the-hole arc-shaped hydraulic steel gate |
| CN103226640A (en) * | 2013-05-08 | 2013-07-31 | 蔡坤 | Design method for longspan steel arch-gate containing fork type supporting arm based on SIMP theory |
-
2016
- 2016-05-03 CN CN201610286043.XA patent/CN105756020B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007113967A (en) * | 2005-10-18 | 2007-05-10 | Central Res Inst Of Electric Power Ind | Method of evaluating reliability of structure deteriorated due to aging |
| CN102968518A (en) * | 2012-10-08 | 2013-03-13 | 蔡坤 | Topology optimization design method for novel down-the-hole arc-shaped hydraulic steel gate |
| CN103226640A (en) * | 2013-05-08 | 2013-07-31 | 蔡坤 | Design method for longspan steel arch-gate containing fork type supporting arm based on SIMP theory |
Non-Patent Citations (3)
| Title |
|---|
| 刘计良等: "基于合理布置的三支臂弧门主框架优化设计", 《浙江大学学报（工学版）》 * |
| 王正中: "关于大中型弧形钢闸门合理结构布置及计算图式的探讨", 《人民长江》 * |
| 蔡元奇等: "弧形钢闸门结构整体优化设计", 《武汉大学学报（工学版）》 * |
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